Fuel nozzle for carburetors



A. P. BARKER FUEL NOZZLE FOR CARBURETORS Filed Feb. 26, 1923 2Sheets-Sheet 1 A j TEEEUfi Eur/(Er, H'TVEUTEIT;

Dec: i23 1924 A. P. BARKER FUEL NOZZLE FOR CARBURETORS Filed Feb. 26,1923 2 Sheets-Sheet 2 A'htn-HE Patented Dec. 23, 1924.

UNITED STATES ARTHUR PRESCOTT BARKER, OI LYNN, MASSACHUSETTS.

FtlEL NOZZLE FOB CABBURETORS.

Application filed February .26, 1928-. Serial No. 621,175.

To all whom it may concern Be it known that ARTHUR PRESCOTT BARKER,citizen of the United States of America, residing at Lynn, in the countyof Essex and Commonwealth of Massachusetts, has invented certain new anduseful'Improvements in Fuel Nozzles for Carburetors, ofwhich thefollowing is such a full, clear, and exact description as will enableothers versed in the'art to which it appertains to make and use thesame.

My invention relates to the fuel nozzles of carburetors intended for usewith internal combustion engines. It embodies the combinationsconstructions and arrangements herein set forth and claimed.

The objects of my invention are to eliminate screens and other clogabledevices here tofore resorted to for fuel mixing; to insure a moreperfect fuel combustion than has heretofore been had; to largelyeliminate carbon; to insure maximum power from minimum fuel consumption,and to achieve the vaporization of a volatile fuel through atomization,thereby increasing the exposed surface of the fuel and facilitatingvaporization, by then dispersing these atomized particles throughoutincoming air currents, thus furnishing a thorough and uniform mixturecapable of complete combustion.

I accomplish the objects of my invention as shown in the accompanyingdrawings, which form a part ofthis specification, an in which Figure 1shows my device attached to an internal combustion engine.

Figure 2 shows the detail of my improved nozzle.

Referring again to Figure 1, A shows the intake of the! internalcombustion engine pictured. B shows a piston, D shows my improved spraynozzle in its intended position, E shows the carburetor, M shows the airintake. In Figure 2, C shows the passage throu h the center of thenozzle D, F shows the ell mouth at the end of the passage O, G shows thecuts .in the bell mouth, H shows the inclined faces on said cuts, Jshows the projections extending from the inclined faces H, K shows aseries of horizontal grooves which cross the vertical grooves L.

Those familiar with the art to which my invention appertains willunderstand that as the air pressure is reduced in theair passage A(Fig.' 1) by the suction stroke of a piston B of the engine, astream ofliquid fuel is forced thru the passage C of the ,nozzle D by thepressure of the air in the float chamber E. The liquid stream spreadsout at the cuts Gin the bell mouth, contacting with and following theinclined faces H, thru force of adhesion. Each of the liquid fuel streamdivisions,- following the respective inclined faces H at the instant ofprojection from the nozzle, is subdivided by contact with a projection Jextending from the inclined face H into the bell mouth F,thussubdividing the stream of liquid fuel and preparing it for mixingwith the air then rushing up the exterior grooves L. As the onrushingair strikes the stream of liquid fuel at points where the adhesive forcehas most effectively weakened its cohesion, a maximum disruption oftering, vaporizing and mixing the liquid fuel stream against which theyare projected.

The foregoing is a description of the effect of the nozzle upon the aircurrents, the liquid fuel, and their interaction prior to reaching thetip of the nozzle. After the air currents, rushing by the horizontalgrooves K, pass the tip of the nozzle they converge, by reason of thecurvature of the restricted orifice above the nozzle toward its centerforming a sort of dome. The air rushing up the vertical grooves L, picksup the fuel as above described, projects it against and into this'airdome, where the interacting and co-acting currents produce completeatomization. The atomized fuel is then dispersed throughout the intaketube. The liquid fuel stream is thus projected into violently a itatedair currents before, at the time of an after leaving the nozzle,resulting in its complete disruption and vaporization. The completecombustion of the resulting mixture is thus rendered possible.

Having thus described my invention 1 claim as new and desire to secureby Letters Patent of the United States.

1. A fuel nozzle for carburetors presenting a bell mouth and, grooved toprovide a series of exterior ,vertical grooves extending into the bellmouth and a series of horizontal grooves extending between the verticalgrooves. I

2. A fuel nozzle for carburetors presenting a fuel orifice, and fuelatomizing prongs formed by parts of the nozzle projecting into theorifice.

'3. A fuel nozzle for carburetors presenting said peaks terminating inprongs which extend into the said mouth.

5. A fuel nozzle for carburetors having a entering the said ell mouth insuch manner as to dlvide the same into relatively spaced apart members,and a fuel atomizing projection carried'b each member and projectinginto the sai fuel passage.

n testimony whereof I aflix my signature in the presence of twowitnesses. i

A. PRESCOTT BARKER.

Witnesses:

CHARLES W. 'Lovn'r'r, LUoY I. BOTTOMLEY.

